tree 9279ad6fd8bf755cb059ab9d89dd061ac2147f93
parent b14c369d87d7fbf120ad21919d34a8f1290290f1
author Stefan Richter <stefanr@s5r6.in-berlin.de> 1308769508 +0200
committer Stefan Richter <stefanr@s5r6.in-berlin.de> 1310224328 +0200

firewire: ohci: fix PHY reg access after card ejection

Detect and handle ejection of FireWire CardBus cards in PHY register
accesses:

  - The last attempt of firewire-core to reset the bus during shutdown
    caused a spurious "firewire_ohci: failed to write phy reg" error
    message in the log.  Skip this message as well as the prior retry
    loop that needlessly took 100 milliseconds.

  - In the unlikely case that a PHY register was read right after card
    ejection, a bogus value was obtained and possibly acted upon.
    Instead, fail the read attempt.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>